数控直流电流源
林彩莲 黎智华 周双强
(广西师范大学 物理与信息工程学院 创新基地 桂林 541004 )
摘要
转载（小飞的笔记）
本数控直流电流源以单片机AT89Ｓ51为控制核心，由D/A转换器TLC5615、A/D转换器TLC2543、中文字库液晶显示块、放大电路和大功率调整电路组成。通过4x4键盘输入给定值，由D/A转换器将数字信号转换成模拟信号，经D/A输出电压作为恒流源的参考电压，以ＬＭＯＰ０７作为电压跟随器，利用晶体管平坦的输出特性得到恒定的电流输出，最后用中文液晶显示输出。
http://www.hc166.com/bbs 华程社区整理
[Abstract] The Digital Controlled DC Current Source uses the single chip AT89S51 as the core, and consists of TLC5615 D/A converter, TLC2543 A/D converter, Chinese character LCD display unit, amplifying circuit and power adjustment circuit. Based on the given value from a 4X4 keyboard, the digital signal is converted into analog signal. The D/A output voltage is used as the reference value for the constant current source and the LMOP07 is used as the voltage following device, thus a constant current output is obtained due to the smooth output features of the transistor and the output is displayed on a Chinese character LCD.
